The Pelli Robson Contrast Sensitivity Test is a tool used to assess discrimination between lighter and darker objects within the visual field. Discrimination of contrast sensitivity is especially important during tasks such as diving in low light. People with cataracts often have difficulty dawn/dusk/night driving because glare evens out light intensity. A brief summary of contrast sensitivity testing may be found by following this link. Scoring for the Pelli-Robson Contrast Sensitivity Test may be found by following this link.
